OFF-SEASON POT MUM (Dendranthema grandiflora TZVELEV) PRODUCTION THROUGH PHOTOPERIODIC MANIPULATION AND PINCHING
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Date
2024-05-28
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UHF Nauni
Abstract
The present investigation entitled “Off-season pot mum (Dendranthema grandiflora
Tzvelev) production through photoperiodic manipulation and pinching” was carried out at
Research Farm of Department of Floriculture and Landscape Architecture, Dr. YS Parmar
University of Horticulture and Forestry, (Nauni) Solan (HP) for two consecutive years; 2022 and
2023. The experiment was laid out in CRD (Factorial) with three replications. For pot mum
production, genotype ‘UHFSChr-56’ was planted at six different times of the year (15th March,
15th April, 15th May, 15th June, 15th July and 15th August) with four pinching treatments (no
pinch, single pinch, double pinch and triple pinch) under two photoperiodic conditions (natural
photoperiod and controlled photoperiod). In March planting, triple pinching resulted in the
production of best quality pots with maximum pot presentability (95.88 and 94.95 during 2022
and 2023, respectively) and benefit-cost ratio (5.34 in controlled photoperiod). In April planting,
the best pots were noted in triple pinch with maximum pot presentability (97.57 and 96.50 during
2022 and 2023, respectively) and benefit-cost ratio (5.44 in controlled photoperiod). In case of
May planting, the best results of pot presentability (97.56 and 96.68 during 2022 and 2023,
respectively) and benefit-cost ratio (4.83 in natural photoperiod) were observed in triple pinch.
Further, June planting resulted in maximum pot presentability (97.16 and 96.08 during 2022 and
2023, respectively) and benefit-cost ratio (5.16 in natural photoperiod) when plants were
subjected to triple pinch. However, in July planting, double pinched plants gave the best results
for pot presentability (95.65 and 94.62 during 2022 and 2023, respectively) and benefit-cost ratio
(4.84 in natural photoperiod). In August planting, single pinched plants gave the best result of pot
presentability (87.16 and 86.67 during 2022 and 2023, respectively) and benefit-cost ratio (4.59
in natural photoperiod). Further, out of all planting dates, April planting of ‘UHFSChr-56’
subjected to triple pinch and grown under controlled photoperiod produced the best quality offseason
pots with maximum benefit-cost ratio (5.44). Hence, off-season flowering pots of
‘UHFSChr-56’ could be successfully produced by staggered planting starting from March to
August using different pinching treatments.